Terminated in 1/4". Great condition. Stock HD650 cable included. I really like these old driver 580's more than the current 600's or 650's for solid state amps/digital. The plastic grilles make them light and durable. Asking $200 + shipping.
Price drop to $200 for quick sale.

It's a great amp. Bright, clean, fast, audiophile-quality and robustly built. I use it for location sound and as a hifi headphone amp when I need to. Can't go wrong with Sound Devices gear.
10+ hours battery life on 2 AA's too!

I have the Avid HD Native thunderbolt interface (for Pro Tools) that has a built-in headphone amp. When driving my AKG K702's, this amp/dac gives me smooth, pristine and very clean sound. It's about as good as I've found for critical listening on headphones. It's very powerful, going beyond 12 o' clock is ear damage zone for me.

Just bought this off e-bay. Here is the listing:
http://www.ebay.com/itm/SMSL-SD-1955-DIR9001-AD1955-High-end-MINI-DAC-Optical-coaxial-B-/120794825137?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D2948213992963933263%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D120794825137%26
Works great, just don't have a use for it. Ships from Los Angeles.